refactor(mkdirp): reorg (denoland/deno_std#103)

Original: https://github.com/denoland/deno_std/commit/41312ad39fe77cee7dd2cc4b48308eebb45f870a

2 files changed, 73 insertions, 0 deletions

diff --git a/fs/mkdirp.ts b/fs/mkdirp.ts
new file mode 100644
index 000000000..627166043
--- /dev/null
+++ b/fs/mkdirp.ts
@@ -0,0 +1,43 @@
+/**
+ * # deno-mkdirp
+ *
+ * `mkdir -p` 4 `deno`.
+ *
+ * ## Import
+ *
+ * ```ts
+ * import { mkdirp } from "https://deno.land/x/std/fs/mkdirp.ts";
+ * ```
+ *
+ * ## API
+ *
+ * Same as [`deno.mkdir`](https://deno.land/typedoc/index.html#mkdir).
+ *
+ * ### `mkdirp(path: string, mode?: number) : Promise<void>`
+ *
+ * Creates directories if they do not already exist and makes parent directories as needed.
+ */
+import { ErrorKind, FileInfo, lstat, mkdir, platform } from "deno";
+
+const PATH_SEPARATOR: string = platform.os === "win" ? "\\" : "/";
+
+export async function mkdirp(path: string, mode?: number): Promise<void> {
+  for (
+    let parts: string[] = path.split(/\/|\\/),
+      parts_len: number = parts.length,
+      level: string,
+      info: FileInfo,
+      i: number = 0;
+    i < parts_len;
+    i++
+  ) {
+    level = parts.slice(0, i + 1).join(PATH_SEPARATOR);
+    try {
+      info = await lstat(level);
+      if (!info.isDirectory()) throw Error(`${level} is not a directory`);
+    } catch (err) {
+      if (err.kind !== ErrorKind.NotFound) throw err;
+      await mkdir(level, mode);
+    }
+  }
+}
diff --git a/fs/mkdirp_test.ts b/fs/mkdirp_test.ts
new file mode 100644
index 000000000..a3a4fac03
--- /dev/null
+++ b/fs/mkdirp_test.ts
@@ -0,0 +1,30 @@
+import { cwd, lstat, makeTempDirSync, removeAll, FileInfo } from "deno";
+import { test, assert } from "../testing/mod.ts";
+import { mkdirp } from "./mkdirp.ts";
+
+let root: string = `${cwd()}/${Date.now()}`; //makeTempDirSync();
+
+test(async function createsNestedDirs(): Promise<void> {
+  const leaf: string = `${root}/levelx/levely`;
+  await mkdirp(leaf);
+  const info: FileInfo = await lstat(leaf);
+  assert(info.isDirectory());
+  await removeAll(root);
+});
+
+test(async function handlesAnyPathSeparator(): Promise<void> {
+  const leaf: string = `${root}\\levelx\\levely`;
+  await mkdirp(leaf);
+  const info: FileInfo = await lstat(leaf.replace(/\\/g, "/"));
+  assert(info.isDirectory());
+  await removeAll(root);
+});
+
+test(async function failsNonDir(): Promise<void> {
+  try {
+    await mkdirp("./test.ts/fest.fs");
+  } catch (err) {
+    // TODO: assert caught DenoError of kind NOT_A_DIRECTORY or similar
+    assert(err);
+  }
+});